/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "WidgetUtils.h"

#include "mozilla/TextEvents.h"

#include "nsIBaseWindow.h"

#include "nsIDocShellTreeItem.h"

#include "nsIDocShell.h"

#include "nsIInterfaceRequestorUtils.h"

#include "nsPIDOMWindow.h"

namespace mozilla {

namespace widget {

// static

void

WidgetUtils::Shutdown()

{

  WidgetKeyboardEvent::Shutdown();

}

// static

already_AddRefed<nsIWidget>

WidgetUtils::DOMWindowToWidget(nsPIDOMWindowOuter* aDOMWindow)

{

  nsCOMPtr<nsIWidget> widget;

  nsCOMPtr<nsPIDOMWindowOuter> window = aDOMWindow;

  if (window) {

    nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(window->GetDocShell()));

    while (!widget && baseWin) {

      baseWin->GetParentWidget(getter_AddRefs(widget));

      if (!widget) {

        nsCOMPtr<nsIDocShellTreeItem> docShellAsItem(do_QueryInterface(baseWin));

        if (!docShellAsItem)

          return nullptr;

        nsCOMPtr<nsIDocShellTreeItem> parent;

        docShellAsItem->GetParent(getter_AddRefs(parent));

        window = do_GetInterface(parent);

        if (!window)

          return nullptr;

        baseWin = do_QueryInterface(window->GetDocShell());

      }

    }

  }

  return widget.forget();

}

// static

uint32_t

WidgetUtils::ComputeKeyCodeFromChar(uint32_t aCharCode)

{

  if (aCharCode >= 'A' && aCharCode <= 'Z') {

    return aCharCode - 'A' + NS_VK_A;

  }

  if (aCharCode >= 'a' && aCharCode <= 'z') {

    return aCharCode - 'a' + NS_VK_A;

  }

  if (aCharCode >= '0' && aCharCode <= '9') {

    return aCharCode - '0' + NS_VK_0;

  }

  switch (aCharCode) {

    case ' ': return NS_VK_SPACE;

    case '\t': return NS_VK_TAB;

    case ':': return NS_VK_COLON;

    case ';': return NS_VK_SEMICOLON;

    case '<': return NS_VK_LESS_THAN;

    case '=': return NS_VK_EQUALS;

    case '>': return NS_VK_GREATER_THAN;

    case '?': return NS_VK_QUESTION_MARK;

    case '@': return NS_VK_AT;

    case '^': return NS_VK_CIRCUMFLEX;

    case '!': return NS_VK_EXCLAMATION;

    case '"': return NS_VK_DOUBLE_QUOTE;

    case '#': return NS_VK_HASH;

    case '$': return NS_VK_DOLLAR;

    case '%': return NS_VK_PERCENT;

    case '&': return NS_VK_AMPERSAND;

    case '_': return NS_VK_UNDERSCORE;

    case '(': return NS_VK_OPEN_PAREN;

    case ')': return NS_VK_CLOSE_PAREN;

    case '*': return NS_VK_ASTERISK;

    case '+': return NS_VK_PLUS;

    case '|': return NS_VK_PIPE;

    case '-': return NS_VK_HYPHEN_MINUS;

    case '{': return NS_VK_OPEN_CURLY_BRACKET;

    case '}': return NS_VK_CLOSE_CURLY_BRACKET;

    case '~': return NS_VK_TILDE;

    case ',': return NS_VK_COMMA;

    case '.': return NS_VK_PERIOD;

    case '/': return NS_VK_SLASH;

    case '`': return NS_VK_BACK_QUOTE;

    case '[': return NS_VK_OPEN_BRACKET;

    case '\\': return NS_VK_BACK_SLASH;

    case ']': return NS_VK_CLOSE_BRACKET;

    case '\'': return NS_VK_QUOTE;

  }

  return 0;

}

// static

void

WidgetUtils::GetLatinCharCodeForKeyCode(uint32_t aKeyCode,

                                        bool aIsCapsLock,

                                        uint32_t* aUnshiftedCharCode,

                                        uint32_t* aShiftedCharCode)

{

  MOZ_ASSERT(aUnshiftedCharCode && aShiftedCharCode,

             "aUnshiftedCharCode and aShiftedCharCode must not be NULL");

  if (aKeyCode >= NS_VK_A && aKeyCode <= NS_VK_Z) {

    *aUnshiftedCharCode = *aShiftedCharCode = aKeyCode;

    if (aIsCapsLock) {

      *aShiftedCharCode += 0x20;

    } else {

      *aUnshiftedCharCode += 0x20;

    }

    return;

  }

  // aShiftedCharCode must be zero for non-alphabet keys.

  *aShiftedCharCode = 0;

  if (aKeyCode >= NS_VK_0 && aKeyCode <= NS_VK_9) {

    *aUnshiftedCharCode = aKeyCode;

    return;

  }

  switch (aKeyCode) {

    case NS_VK_SPACE:               *aUnshiftedCharCode = ' '; break;

    case NS_VK_COLON:               *aUnshiftedCharCode = ':'; break;

    case NS_VK_SEMICOLON:           *aUnshiftedCharCode = ';'; break;

    case NS_VK_LESS_THAN:           *aUnshiftedCharCode = '<'; break;

    case NS_VK_EQUALS:              *aUnshiftedCharCode = '='; break;

    case NS_VK_GREATER_THAN:        *aUnshiftedCharCode = '>'; break;

    case NS_VK_QUESTION_MARK:       *aUnshiftedCharCode = '?'; break;

    case NS_VK_AT:                  *aUnshiftedCharCode = '@'; break;

    case NS_VK_CIRCUMFLEX:          *aUnshiftedCharCode = '^'; break;

    case NS_VK_EXCLAMATION:         *aUnshiftedCharCode = '!'; break;

    case NS_VK_DOUBLE_QUOTE:        *aUnshiftedCharCode = '"'; break;

    case NS_VK_HASH:                *aUnshiftedCharCode = '#'; break;

    case NS_VK_DOLLAR:              *aUnshiftedCharCode = '$'; break;

    case NS_VK_PERCENT:             *aUnshiftedCharCode = '%'; break;

    case NS_VK_AMPERSAND:           *aUnshiftedCharCode = '&'; break;

    case NS_VK_UNDERSCORE:          *aUnshiftedCharCode = '_'; break;

    case NS_VK_OPEN_PAREN:          *aUnshiftedCharCode = '('; break;

    case NS_VK_CLOSE_PAREN:         *aUnshiftedCharCode = ')'; break;

    case NS_VK_ASTERISK:            *aUnshiftedCharCode = '*'; break;

    case NS_VK_PLUS:                *aUnshiftedCharCode = '+'; break;

    case NS_VK_PIPE:                *aUnshiftedCharCode = '|'; break;

    case NS_VK_HYPHEN_MINUS:        *aUnshiftedCharCode = '-'; break;

    case NS_VK_OPEN_CURLY_BRACKET:  *aUnshiftedCharCode = '{'; break;

    case NS_VK_CLOSE_CURLY_BRACKET: *aUnshiftedCharCode = '}'; break;

    case NS_VK_TILDE:               *aUnshiftedCharCode = '~'; break;

    case NS_VK_COMMA:               *aUnshiftedCharCode = ','; break;

    case NS_VK_PERIOD:              *aUnshiftedCharCode = '.'; break;

    case NS_VK_SLASH:               *aUnshiftedCharCode = '/'; break;

    case NS_VK_BACK_QUOTE:          *aUnshiftedCharCode = '`'; break;

    case NS_VK_OPEN_BRACKET:        *aUnshiftedCharCode = '['; break;

    case NS_VK_BACK_SLASH:          *aUnshiftedCharCode = '\\'; break;

    case NS_VK_CLOSE_BRACKET:       *aUnshiftedCharCode = ']'; break;

    case NS_VK_QUOTE:               *aUnshiftedCharCode = '\''; break;

    default:                        *aUnshiftedCharCode = 0; break;

  }

}

} // namespace widget

} // namespace mozilla